/*****************************************************************************
* flv_bytestream.h: flv muxer utilities
*****************************************************************************
* Copyright (C) 2009-2011 x264 project
*
* Authors: Kieran Kunhya <kieran@kunhya.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02111, USA.
*
* This program is also available under a commercial proprietary license.
* For more information, contact us at licensing@x264.com.
*****************************************************************************/

#ifndef X264_FLV_BYTESTREAM_H
#define X264_FLV_BYTESTREAM_H

#include <stdio.h>
#include "typedef.h"

/* offsets for packed values */
#define FLV_AUDIO_SAMPLESSIZE_OFFSET 1
#define FLV_AUDIO_SAMPLERATE_OFFSET  2
#define FLV_AUDIO_CODECID_OFFSET     4

#define FLV_VIDEO_FRAMETYPE_OFFSET   4

/* bitmasks to isolate specific values */
#define FLV_AUDIO_CHANNEL_MASK    0x01
#define FLV_AUDIO_SAMPLESIZE_MASK 0x02
#define FLV_AUDIO_SAMPLERATE_MASK 0x0c
#define FLV_AUDIO_CODECID_MASK    0xf0

#define FLV_VIDEO_CODECID_MASK    0x0f
#define FLV_VIDEO_FRAMETYPE_MASK  0xf0

#define AMF_END_OF_OBJECT         0x09

enum
{
	FLV_HEADER_FLAG_HASVIDEO = 1,
	FLV_HEADER_FLAG_HASAUDIO = 4,
};

enum
{
	FLV_TAG_TYPE_AUDIO = 0x08,
	FLV_TAG_TYPE_VIDEO = 0x09,
	FLV_TAG_TYPE_META = 0x12,
};

enum
{
	FLV_MONO = 0,
	FLV_STEREO = 1,
};

enum
{
	FLV_SAMPLESSIZE_8BIT = 0,
	FLV_SAMPLESSIZE_16BIT = 1 << FLV_AUDIO_SAMPLESSIZE_OFFSET,
};

enum
{
	FLV_SAMPLERATE_SPECIAL = 0, /**< signifies 5512Hz and 8000Hz in the case of NELLYMOSER */
	FLV_SAMPLERATE_11025HZ = 1 << FLV_AUDIO_SAMPLERATE_OFFSET,
	FLV_SAMPLERATE_22050HZ = 2 << FLV_AUDIO_SAMPLERATE_OFFSET,
	FLV_SAMPLERATE_44100HZ = 3 << FLV_AUDIO_SAMPLERATE_OFFSET,
};

enum
{
	FLV_CODECID_MP3 = 2 << FLV_AUDIO_CODECID_OFFSET,
	FLV_CODECID_AAC = 10 << FLV_AUDIO_CODECID_OFFSET,
};

enum
{
	FLV_CODECID_H264 = 7,
};

enum
{
	FLV_FRAME_KEY = 1 << FLV_VIDEO_FRAMETYPE_OFFSET | 7,
	FLV_FRAME_INTER = 2 << FLV_VIDEO_FRAMETYPE_OFFSET | 7,
};

typedef enum
{
	AMF_DATA_TYPE_NUMBER = 0x00,
	AMF_DATA_TYPE_BOOL = 0x01,
	AMF_DATA_TYPE_STRING = 0x02,
	AMF_DATA_TYPE_OBJECT = 0x03,
	AMF_DATA_TYPE_NULL = 0x05,
	AMF_DATA_TYPE_UNDEFINED = 0x06,
	AMF_DATA_TYPE_REFERENCE = 0x07,
	AMF_DATA_TYPE_MIXEDARRAY = 0x08,
	AMF_DATA_TYPE_OBJECT_END = 0x09,
	AMF_DATA_TYPE_ARRAY = 0x0a,
	AMF_DATA_TYPE_DATE = 0x0b,
	AMF_DATA_TYPE_LONG_STRING = 0x0c,
	AMF_DATA_TYPE_UNSUPPORTED = 0x0d,
} AMFDataType;

typedef struct flv_buffer
{
	uint8_t *data;
	unsigned d_cur;
	unsigned d_max;
	FILE *fp;
	uint64_t d_total;
} flv_buffer;

flv_buffer *flv_create_writer(const char *filename);
int flv_append_data(flv_buffer *c, uint8_t *data, unsigned size);
int flv_write_byte(flv_buffer *c, uint8_t *byte);
int flv_flush_data(flv_buffer *c);
void rewrite_amf_be24(flv_buffer *c, unsigned length, unsigned start);

uint64_t dbl2int(double value);
uint64_t get_amf_double(double value);
void x264_put_byte(flv_buffer *c, uint8_t b);
void x264_put_be32(flv_buffer *c, uint32_t val);
void x264_put_be64(flv_buffer *c, uint64_t val);
void x264_put_be16(flv_buffer *c, uint16_t val);
void x264_put_be24(flv_buffer *c, uint32_t val);
void x264_put_tag(flv_buffer *c, const char *tag);
void x264_put_amf_string(flv_buffer *c, const char *str);
void x264_put_amf_double(flv_buffer *c, double d);

#endif
